400 stroker

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Rmoore

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440 Source has the stroker kit listed. I want 10.5 comp pistons with a 78cc head. All they list is 9.71 comp for the 78cc head. Is there anyone that makes this stroker kit with 10.5 comp pistons for 78cc head ??
 
what head gasket do they recommend, just go a little thinner. if one is available.
 
what head gasket do they recommend, just go a little thinner. if one is available.
Trick flow says to run fel pro .039 thick comp gasket. I have some .020 steel shim gaskets. 1) will they work with the trick flow heads. 2) how much comp is .019 going to give me ?
 
I've used steel shim on iron heads but not on aluminum heads. call trick flow and ask them. I am building two 400 blocks right now. one with 440-1 max wedge heads and the other trick flow 270's. It's a slow process
 
I've used steel shim on iron heads but not on aluminum heads. call trick flow and ask them. I am building two 400 blocks right now. one with 440-1 max wedge heads and the other trick flow 270's. It's a slow process
All I have ever run is the 452 heads with the steel shim. Never alum heads .
 
440 Source has the stroker kit listed. I want 10.5 comp pistons with a 78cc head. All they list is 9.71 comp for the 78cc head. Is there anyone that makes this stroker kit with 10.5 comp pistons for 78cc head ??

You might not be able to buy exactly what you want from 440Source. If not then look for a stroker kit from a different supplier. 440Source uses ICON pistons so you might have to find a kit made with Diamond, JE, SRP, Wiseco, etc. pistons. There are lots and lots of choices out there.

Don't use steel shim gaskets with aluminum heads but you can use Cometic gaskets. Cometic gaskets are available in lots of bore sizes and gasket thickness. Look at their website or catalog.
 
You might not be able to buy exactly what you want from 440Source. If not then look for a stroker kit from a different supplier. 440Source uses ICON pistons so you might have to find a kit made with Diamond, JE, SRP, Wiseco, etc. pistons. There are lots and lots of choices out there.

Don't use steel shim gaskets with aluminum heads but you can use Cometic gaskets. Cometic gaskets are available in lots of bore sizes and gasket thickness. Look at their website or catalog.
Thank you Sir. I'll look at Mancini and see
 
This is not a big deal.

You're going to mill the block anyway, right? So mill the block to 9.957" zero deck (-.023") instead of 9.980", mill the heads for 75 cc (What's that, about .018"?), use an .039" gasket and settle for 10.37:1 compression? I don't think you"ll be able to tell 10.5:1 to 10.37 compression difference. Oh, and you'll most likely have to mill the intake manifold and/or head intake surface a total .050".
 
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Trick flow says to run fel pro .039 thick comp gasket. I have some .020 steel shim gaskets. 1) will they work with the trick flow heads. 2) how much comp is .019 going to give me ?
I have used steel shim gaskets with aluminum heads, and no issues. Sealed them with Copper Coat. I know a guy in England that used them on a 383 , alum heads, he drives his RR everyday and no leaks. Sealed them with Hylomar. It really isnt recommended, but some guys get away with it. Since you have a choice at this point, i would do as Jim said, deck the block for zero clearance, and use a .039 composition gasket that's approved for use with Alum heads. Then you'll get some good quench too! Check out the UEM COMPRESSION RATIO CALCULATORS, for quick answers on C/R
 
not sure if it's available stateside bit i've used wellseal on 4 stroke bike motors with no head gasket at all and they seal fine so ought to work well with the steel shim gaskets. it stinks but seals well so gets my vote.
neil.
wellseal | eBay
 
not sure if it's available stateside bit i've used wellseal on 4 stroke bike motors with no head gasket at all and they seal fine so ought to work well with the steel shim gaskets. it stinks but seals well so gets my vote.
neil.
wellseal | eBay
Looks like it stays flexible, like Hylomar. That's good. The problem with the steel gasket between cast iron and aluminum, is the different expansion rates between the 2 metals. This stresses the gasket, and eventually leads to a coolant leak, or worse. The MLS gasket has several layers, and allows the 2 metals to slide past each other smoothly, with the expansion/contraction from temperature changes.
 
Looks like it stays flexible, like Hylomar. That's good. The problem with the steel gasket between cast iron and aluminum, is the different expansion rates between the 2 metals. This stresses the gasket, and eventually leads to a coolant leak, or worse. The MLS gasket has several layers, and allows the 2 metals to slide past each other smoothly, with the expansion/contraction from temperature changes.
I've always used silver paint with the steel shim gasket. But it was always with cast heads. And have never had a problem..
 
This is not a big deal.

You're going to mill the block anyway, right? So mill the block to 9.957" zero deck (-.023") instead of 9.980", mill the heads for 75 cc (What's that, about .018"?), use an .039" gasket and settle for 10.37:1 compression? I don't think you"ll be able to tell 10.5:1 to 10.37 compression difference. Oh, and you'll most likely have to mill the intake manifold and/or head intake surface a total .050".
Just wondering what guys usually do after they mill the intake surface of the head, to get the valley pan gasket to seal at the corners? Because there is now a .050" gap there at the corner where the pan meets the head. A small dab of silicone? The rails on the block can be milled too, I suppose, to make the block and head meet evenly.
 
If you wish to keep everything even, you mill the block rails .017" for every .010" from the block/head combustion chamber surfaces. I rarely do that milling and have had no sealing problems with silicone.
 
Of topic a bit, not sure how to start a new conversation because it wants me to ad participants and I just want to ask a question.
I had a machine shop bore my 400, install the pistons on the rods and deck the block. I bought KB Hypereutectic pistons, 9.3:1 compression ratio, and when I get them back, the valve reliefs were on the bottom, closer to the exhaust port, of the pistons. As long as the valve clearance is good, should it be a problem? They rebuild a lot of engines and I am wondering if they screwed up big time. It's been a while since I had it done and now trying to sell the engine. Any info would be helpful. I am adding pics to conversation to show the delima I am having. Isn't the even cylinders on the passenger side of the block and the odd on the drivers side?

20190205_132426.jpg


20190205_132444.jpg
 
Those are all in upside backwards!
I think the fella was smoking crack that day. The rods are on the correct journals but the pistons are bass akwards. Going to check and see if they're floating or pressed. If they're floating I will fix it myself. Don't want them touching it. If they're pressed, they will be fixing them and if they break something, they replace it.
 
Who assembled the motor? You, or the machine shop? Dr side 1-3-5-7. Passenger side all even #. I can't tell where the front of the block is, but the arrows normally point towards the front. They may be numbered incorrectly.
 
If you want to start a new thread, go to the top of the forum heading you want to start one in, and select post new thread . Then the page will come up. Conversations is for private messages.
 
I think the fella was smoking crack that day. The rods are on the correct journals but the pistons are bass akwards. Going to check and see if they're floating or pressed. If they're floating I will fix it myself. Don't want them touching it. If they're pressed, they will be fixing them and if they break something, they replace it.
The rods can be on any of the rod journals . but it matters that the rods are turned correctly on the journals . the oil squirt hole on the rod needs to be pointing towards the camshaft side. The rod bearing lock needs to be pointing to the oil pan rail. So you may have to flip the rod on one or all pistons.
 
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